/*

* Copyright (c) 2006 Nokia Corporation and/or its subsidiary(-ies). 

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  DS contacts datastore.

*

*/

#ifndef __NSMLCONTACTSMODSFETCHER_H__

#define __NSMLCONTACTSMODSFETCHER_H__

// INCLUDES

#include <SmlDataProvider.h>

#include <SmlDataFormat.h>

#include <f32file.h>

#include <cntdb.h>

#include <cntitem.h>

#include <MContactsModsFetcher.h>

#include <CVPbkContactManager.h>

#include <MVPbkContactStore.h>

#include <MVPbkContactViewObserver.h>

#include <CVPbkSortOrder.h>

#include <MVPbkContactViewBase.h>

#include <MVPbkSingleContactOperationObserver.h>

#include <MVPbkContactOperationBase.h>

// CONSTANTS

const TInt KNSmlSnapshotSize = 56;

const TInt KNSmlSnapshotSmallSize = 8;

_LIT( KNSmlContactSyncNoSync, "none" ); // Taken from phonebook

// CLASS DECLARATION

class CNSmlChangeFinder;

class TNSmlSnapshotItem;

// ------------------------------------------------------------------------------------------------

// CNSmlContactsModsFetcher

//

// @lib nsmlcontactsdataprovider.lib

// ------------------------------------------------------------------------------------------------

class CNSmlContactsModsFetcher : public CActive, public MContactsModsFetcher,

								MVPbkContactViewObserver,

								MVPbkSingleContactOperationObserver,

								MVPbkContactOperationBase

	{

	public:

		/**

		* C++ constructor.

		* @param		aSnapshotRegistered	Is snapshot registered.

		* @param		aCntDb				Pointer to opened database.

		* @param		aKey				Key array.

		* @param		aChangeFinder		Pointer to Changefinder.

		*/

		CNSmlContactsModsFetcher( TBool& aSnapshotRegistered,CVPbkContactManager& aContactManager,MVPbkContactStore& aStore,TKeyArrayFix& aKey, CNSmlChangeFinder& aChangeFinder );

		/**

		* Second phase constructor.

		*/

		void ConstructL();

		/**

		* ~CNSmlContactsModsFetcher() desctructor.

		*/

		virtual ~CNSmlContactsModsFetcher();

	private:

		/**

		* From MVPbkContactViewObserver  

		* Called when a view is ready for use. 

		*/

		void ContactViewReady(

		            MVPbkContactViewBase& aView ) ;

		/**

		* From MVPbkContactViewObserver  

		* Called when a view is unavailable for a while. 

		*/            

		void ContactViewUnavailable(

		            MVPbkContactViewBase& aView ) ;

		/**

		* From MVPbkContactViewObserver  

		* Called when a contact has been added to the view.

		*/            

		void ContactAddedToView(

		            MVPbkContactViewBase& aView, 

		            TInt aIndex, 

		            const MVPbkContactLink& aContactLink );

		/**

		* From MVPbkContactViewObserver  

		* Called when a contact has been removed from a view.

		*/            

		void ContactRemovedFromView(

		            MVPbkContactViewBase& aView, 

		            TInt aIndex, 

		            const MVPbkContactLink& aContactLink ) ;

		/**

		* From MVPbkContactViewObserver  

		* Called when an error occurs in the view.

		*/            

		void ContactViewError(

		            MVPbkContactViewBase& aView, 

		            TInt aError, 

		            TBool aErrorNotified ) ;

		            /**

		* From MVPbkSingleContactOperationObserver  

		* Called when the operation is completed.

		*/

         void VPbkSingleContactOperationComplete(MVPbkContactOperationBase& aOperation,MVPbkStoreContact* aContact ); 

		/**

		* From MVPbkSingleContactOperationObserver  

		*  Called if the operation fails.

		*/

 		void VPbkSingleContactOperationFailed(

 					MVPbkContactOperationBase& aOperation, 

 					TInt aError );

	private:

		/**

		* Fetches next chunk of data (client contacts data changes).

		*/

		void FetchNextContactL();

		/**

		* From CActive. Called when asynchronous operation completes.

		*/

		void RunL();

		/**

		* From CActive. Called when RunL leaves.

		*/    

		TInt RunError( TInt aError );

		/**

		* From CActive. Cancels operation.

		*/

		void DoCancel();

		/**

		* Checks if aItem is confidential or not.

		* @param    aItem   Item that is checked.

		* @return   TBool   ETrue if item is confidential.

		*                   Otherwise EFalse is returned.

		*/

        TBool IsConfidentialL( MVPbkStoreContact& aItem );

        /**

		* Create a contact view of the store which is opened

		*/

        void CreateViewL();

        /**

		* Add the fetched contacts id and timestamp 

		* to the snapshot.

		* @param    aContact   Fetched contact to be 

		*						added to snapshot

		*/

        void UpdateSnapshotL( MVPbkStoreContact* aContact );

    private: // from MContactsModsFetcher

        /**

        * Cancels the current asynchronous request

        */

        void CancelRequest( );

        /**

        * Reads all modifications from clients contacts databse.

        * @param    aStatus   On completion of the operation, contains the result code.

        */    

        void FetchModificationsL( TRequestStatus& aStatus );

	private: // data

		TRequestStatus* iCallerStatus;

		TTime iFromTime;

		CArrayFixSeg<TNSmlSnapshotItem>* iSnapshot;

		TBool& iSnapshotRegistered;

		TKeyArrayFix& iKey;

		CNSmlChangeFinder& iChangeFinder;

		TInt iCurrentSnapshotCounter;

		CVPbkContactManager& iContactManager;

        MVPbkContactStore& iStore;

        MVPbkContactViewBase* iContactViewBase;

        TInt iContactCount;

	};

#endif // __NSMLCONTACTSMODSFETCHER_H__

// End of File